Multiple choice questions on design of experiments

For an independent-measures experiment comparing two treatment conditions with a sample of n = 10 in each treatment, the F-ratio would have df equal to __________.

18

19

1, 18

1, 19

A researcher reports an F-ratio with df = 3, 36 for an independent-measures experiment. How many treatment conditions were compared in this experiment?

3

4

36

39

A research report concludes that there are significant differences among treatments, with "F(2,27) = 8.62, p < .01." How many treatment conditions were compared in this study?

2

3

29

30

A research study compares three treatments with n = 5 in each treatment. If the SS values for the three treatments are 25, 20, and 15, then the analysis of variance would produce SS within equal to __________.

12

20

60

cannot be determined from the information given

In the F-ratio for a repeated-measures ANOVA, variability due to individual differences __________.

is automatically eliminated from the numerator but must be computed and subtracted out of the denominator

is automatically eliminated from the denominator but must be computed and subtracted out of the numerator

is automatically eliminated from both the numerator and the denominator

must be computed and subtracted out of the numerator and the denominator

A repeated-measures study uses a sample of n = 8 participants to evaluate the mean differences among three treatment conditions. In the analysis of variance for this study, what is the value for df total?

2

7

21

23

A repeated-measures analysis of variance with a sample of n = 8 participants, produces df within treatments = 14. What is the value for df error for this analysis?

6

7

21

cannot determine without additional information

Which of the following are sources of variability that contribute to SS between treatments in a repeated ANOVA?

treatment effect and chance/error

treatment effect and individual differences

treatment effect, individual differences, and chance/error

individual differences and chance/error

The results of a repeated-measures ANOVA are reported as follows, F(3, 27) = 1.12, p > .05. How many subjects participated in the study?

40

36

10

9

A two-factor study with two levels of factor A and three levels of factor B uses a separate sample of n = 5 participants in each treatment condition. How many participants are needed for the entire study?

5

10

25

30

The results of a two-factor analysis of variance produce df = 2, 24 for the F-ratio for fac-tor A. Based on this information, how many levels of factor A were compared in the study?